Siemens 3VA1180-3EF36-0AF0 — 80 A SENTRON MCCB for Line Protection
The Siemens 3VA1180-3EF36-0AF0 is a 3-pole SENTRON molded case circuit breaker (MCCB) designed for line protection, carrying a continuous current rating of 80 A at 40 °C and holding that rating through 50 °C before a gentle derating curve begins — 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C. That thermal stability means this breaker fits enclosures with limited airflow without forcing a downsized selection at typical panel ambient temperatures. Breaking capacity spans the voltage range: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V. The TM240 thermal-magnetic release provides fixed instantaneous and overload protection — no electronic adjustment, which simplifies specification for standard distribution panels where the fault current profile is well understood. Rated insulation voltage is 800 V, and the auxiliary switch configuration comes as 1 auxiliary switch + 1 trip alarm switch HQ — useful for remote status indication without adding a separate accessory module.
Panel Fit and Mounting
Dimensions are 130 mm height, 76.2 mm width, and 70 mm depth — a compact footprint for a 3-pole MCCB in this current class. The 70 mm depth is the key number for gland-plate clearance and DIN-rail enclosure depth; it fits standard 200 mm deep enclosures with room for wiring gutters.